High-performance inverted planar heterojunction perovskite solar cells based on lead acetate precursor with efficiency exceeding 18%

Zhao, Lichen and Luo, Deying and Wu, Jiang and Hu, Qin and Zhang, Wei and Chen, Ke and Liu, Tanghao and Liu, Yi and Zhang, Yifei and Liu, Feng and Russell, Thomas P. and Snaith, Henry J. and Zhu, Rui and Gong, Qihuang (2016) High-performance inverted planar heterojunction perovskite solar cells based on lead acetate precursor with efficiency exceeding 18%. Advanced Functional Materials, 26 (20). pp. 3508-3514. ISSN 1616-301X

Full content URL: http://dx.doi.org/10.1002/adfm.201601175

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High-performance inverted planar heterojunction perovskite solar cells based on lead acetate precursor with efficiency exceeding 18%
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Abstract

Organic-inorganic lead halide perovskites are emerging materials for the next-generation photovoltaics. Lead halides are the most commonly used lead precursors for perovskite active layers. Recently, lead acetate (Pb(Ac)2) has shown its superiority as the potential replacement for traditional lead halides. Here, we demonstrate a strategy to improve the efficiency for the perovskite solar cell based on lead acetate precursor. We utilized methylammonium bromide as an additive in the Pb(Ac)2 and methylammonium iodide precursor solution, resulting in uniform, compact and pinhole-free perovskite films. We observed enhanced charge carrier extraction between the perovskite layer and charge collection layers and delivered a champion power conversion efficiency of 18.3% with a stabilized output efficiency of 17.6% at the maximum power point. The optimized devices also exhibited negligible current density-voltage (J-V) hysteresis under the scanning conditions.

Keywords:perovskite solar cells, inverted planar heterojunction, lead acetate, additive, high efficiency, JCNotOpen
Subjects:F Physical Sciences > F200 Materials Science
F Physical Sciences > F162 Polymer Chemistry
F Physical Sciences > F110 Applied Chemistry
Divisions:College of Science > School of Chemistry
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ID Code:23046
Deposited On:22 Apr 2016 12:34

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